GE 96720 GE232-MVPS-L 120/277 Volt Ultra Start Electronic Fluorescent T8 Programmed Rapid Start Ballast 2 or 1 F32T8 Lamps. The programmed Rapid Start T8 ballast accepts up to 2 or 1 F32T8 lamps. Adapts to multiple voltages from 120 to 277 volts, extra versatile for your unique projects. Extends lamp life in frequently switched applications, over 100,000 on/off cycles. Ultra efficient programmed start ballasts with over 90% efficiency. Mounting Dimensions: 8.9"L x 1.1"W, mounting slot set 0.3" apart. Ultra Start ballasts provide over 100,000 starts and have the equivalent energy savings of instant start ballasts. In addition, it offers a long life similar to a programmed start ballast. Operates quietly with most 120 volt applications, less than 10% Total Harmonic Distortion (THD). Anti-striation circuitry helps eliminate and prevent the spiraling effect of lights. T8 Ballast Sound Rating: Class A (20-24 decibels). Ballast factor rating of low .77 for maximum energy savings low, ballast factor rating controls light output and watts of each lamp, lower BF will reduce light output and wattage of each lamp , which means that more lamps will be needed to achieve a certain level of candle footing in the same area. Parallel lamp operation makes it easy to maintain the unit if one lamp fails, others will remain on. The unit has anti-striation control, thermal protection and universal voltage. Outdoor UL Type 1, UL Type HL, UL Class P, ANSI C62.41, NEMA Premium, ROHS compliant, industry standards for quality and safety